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 Chemistry Questions

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Q:

What is the Greenhouse Effect?

A) The fall in population of plants due to human activity B) It is the warming of earth's surface due to its atmosphere
C) The polluting effect of burning fossil fuels D) The heating of the atmosphere due to depletion of the ozone layer
 
Answer & Explanation Answer: B) It is the warming of earth's surface due to its atmosphere

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Q:

Which of the following is false?

A) Hydrogen atom is roughly a third of the mass of tritium B) Deuterium is called heavy hydrogen
C) Deuterium atom has 1 neutron D) Protium is the rarest isotope of hydrogen
 
Answer & Explanation Answer: D) Protium is the rarest isotope of hydrogen

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Q:

In the Modern Periodic Table elements present in the same period will have the same

A) atomic weight B) number of shells
C) atomic number D) valence electrons
 
Answer & Explanation Answer: B) number of shells

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Q:

What is C12H22O11 also known as

A) Sand B) Sugar
C) Salt D) Clay
 
Answer & Explanation Answer: B) Sugar

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Q:

NaCl is a salt which is made up of

A) Strong acid and weak base B) Weak acid and weak base
C) Strong acid and strong base D) Weak acid and strong base
 
Answer & Explanation Answer: C) Strong acid and strong base

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Q:

Which of the following causes damage to bridges, iron railings and all objects made of metals?

A) Reduction B) Rancidity
C) Acidity D) Corrosion
 
Answer & Explanation Answer: D) Corrosion

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Q:

The hardest natural substance is

A) Graphite B) Diamond
C) Iron D) Copper
 
Answer & Explanation Answer: B) Diamond

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Q:

Non-metallic character increases from ____.

A) Magnesium to Barium B) Potassium to Caesium
C) Oxygen to Selenium D) Sodium to Chlorine 
 
Answer & Explanation Answer: D) Sodium to Chlorine 

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